Roofing



p 8, 1931- R. A. ECKBERG 1,822,134

ROOFING Filed April 15, 1929 I N VEN TOR AT TORNEY Patented Sept. 8,1931 UNITED STATES PATENT OFFICE ROOFING Application filed April 15,

My invention relates to roofing and more particularly to lap joints forroofing sheets, the principal objects of the invention being to reduceleakage at the lap or joint through capillary attraction, wind drivenrains or other causes, to increase the drain area in a lap or joint, tofacilitate the manufacture and installation of roofing sheets and toassure the drainage of water in the drain area of a lap joint.

In accomplishing these and other objects of the invention, I haveprovided improved details of structure, the preferred forms of which areillustrated in the accompanying drawings, wherein:

Fig. 1 is a perspective view of a portion or a roof formed of sheetsprovided with my improved lap joint members.

Fig. 2 is a transverse vertical section of a joint at the point wherethe fastening nail'is installed, illustrating the relation between the.nail and the joint members.

' Fig. 3 is'an enlarged detail view of portions of disassembled jointmembers.

Referring in detail to the drawings:

1 designates generally a roof including a supporting timber member 2such as sheathing, and sheets or metal plates 3 having differentiatedlap joint elements at adjacent edges 4 and 5, namely the right and leftedges as illustrated in the drawings for sealingly connecting the sheetsand providing an enclosed gutter or drain area designated 6 comprising achannel t-hrou h which water that gains access to the join may passtoward the eaves of the roof.

' The joint element 4 includes an upwardly inclined flange 7 at the sideedge of a sheet which will be referred to as the right edge, bentretractively at an acute angle, and forming an outer or side wall of thechannel, and a trough or floor portion 8 having relatively great widthand extending beyond a perpendicular dropped from the margin of the edgeflange to the sheet. An inverted V-shaped upstanding rib or ridge-likehollow head 9 comprising an isolated corrugation is formed at the inneredge of the floor 8, having an inclined inner wall -1O which meets thesheet at a relatively obtuse angle.

1929. Serial N0. 355,329.

The joint element 5 on the adjacent edge of the adjacent sheet comprisesan arch 11 or inverted channel-like rib for covering the gutter formedby the joint element 4, and in-,

plane of the sheet. An outer inclined leg 14 extends downwardly from theweb and is adapted to overlie and engage the inclined wall 10 of the rib9. 1

An edge flange 15 is preferably provided on the edge of the wall 14 toengage the normal upper surface of the adjacent sheet.

The sheets may be secured to the sheathing by suitable means, forexample by nails driven through the sheets at selected points adjacentthe edges of the sheets, to latch the joint elements together, forexample, through the" sheathing-engaged portions of the sheets andadjacent portions of adjacent sheets.

The spacing of the upper edges of the arch walls 12 and 14 by the web 13affords a blank area or seat forinserting fastening nails 16 which maybe driven through the floor of the gutter into the wooden support asillustrated in Fig. 2.

In applying roofing sheets constructed as described, the interlockingseams extend from the ridge toward the eaves. The hook like jointelement 5 of one sheet is laid upon the fold or seam portion of thejoint element 4 of an adjacent laid sheet in interlocking relationtherewith, so that the inner inclined wall 12 of the arch 11 engages theedge flange 7 of the laid sheet, and the outer inclined wall 14 engagesthe inner inclined wall 10 of the rib 9.

Relatively slight pressure causes the arch .to move into close andsealing relation with the related joint elements, the wall 14 slidingover the rib 9 so that the flange 15 may be in close face contact withthe normal sheet portion, a and a ,nail may then be driven through theweb, channel, and flooi" of the gutter into the wooden sheathing.

. the rib 9 is spaced inwardly of the sheet from the vertical plane ofthe edge of flange 7 substantially by the width of the web 13. The nailthus has free access to the floor 8 so that it may engage a flat portionof the sheet and securely bind the same to the wooden members of theroof, and a relatively wide drain area is provided to assure the removalof water that may enter the channel.

The flange 7 tends to support the arch and prevent excessive bending ofthe same when a nail is driven which might unduly tension the arch andutimately cause Withdrawal of the nail.

The joint described further enhances the latching engagement of thesheets since the downward sliding movement of the integral divergingwalls of the arch element over op positely inclined walls of the elementi in tegral with the other sheet, tends to enforce their engagement.

Any water that enters the trough or channel through seepage or othercauses drains to the eaves, and to find a lateral outlet must rise tothe web, and the resilient character of the flange 7 and the enforcementof sealing engagement between the flange and. the arch by application ofthe nail, seal the edge of the flange to the arch to prevent lateralmovement of water from the channel or seepage of Water between theflange and the arch toward the sheathing.

What I claim and desire to secure by Letters Patent 1s:

1. In roofing of the character described, comprising metal sheets, a lapjoint including an arch-like rib on the edge of one sheet, anupwardlyretractively bent flange on the edge of the other sheetpresenting the bottom surface of said flange upwardly for face to faceengagement with the under surface of said rib, and a rib on said othersheet spaced from the flange and adapted to engage another portion ofthe under surface of said first named rib.

2. In roofing of the character described including a' pair of sheets, alap joint for connecting the sheets including an arch rib on the edge ofone sheet having a flange comprising the outer edge of said sheetextending substantially in the plane thereof and adapted to engage theupper surface of the adjacent sheet, an upwardly retractively inclinedflange comprising the edge of said adjacent sheet adapted to engage theunder side of one leg of said rib and a bent portion'of said adjacentsheet adapted to engage the other leg of said rib adjacent the edgeflange thereof.

3. In roofing of the character described, a pair of sheets, one having arelatively low upstanding rib spaced from the outer edge thereof and anouter edge flange bent to an acute angle upwardly retractively over saidsheetand having an outer margin spaced laterally from said rib, theother sheet having an edge rib including an outer wall adapted to engagethe rib of the first named sheet and an inner wall adapted to engage theupturned under surface of the edge flange of the said other sheet.

4. In a device of the character described, including a pair of roofingsheets, an archlike rib at the edge of one sheet comprising an upwardlyangularly extending wall, a downwardly extending wall and a horizontalweb connecting the walls and forming the crown of the rib, the edge ofthe other sheet being bent upwardly retractively to form an edge flangehaving a normally bottom surface presented upwardly to engage the firstnamed upwardly extending Wall, the edge of said flange engaging saidweb, and a rib spaced from said flange to receive said outer rib wa lland provide a floor portion extending beneath said web.

5. In a device of the character described, including a pair of roofingsheets, a rib at the edge of one sheet comprising an upwardly angularlyextending wall, a downwardly extending wall and a horizontal webconnecting the walls and forming the apex of the rib. the other sheethaving an upwardly retractively bent flange at its edge havingsubstantially the same width as the first named upwardly extending walland adapted for face to face engagement with the same, and a rib spacedfrom said flange to receive said-outer rib wall and provide a troughhaving a floor portion 1 extending beneath said web.

6. In roofing of the character described, a sheet having a retractivelyouter edge forming an upbent edge flange and a relatively low upstandingrib spaced from said flange to form a trough, and a sheet having an edgerib forming an arch overlying said trough and including an inner wallengaging said flangeand an outer wall engaging said rib.

7. In roofing including adjacent sheets. a lap joint comprising anupstainding rib on the edge of one sheet forming an arch having innerand outer legs and a web connecting the legs. a flange on the edge ofthe other sheet upbent retractively toward the body of said sheet andhaving substantially the same width as the inner leg of said arch, thenormally bottom surface of said flange being presented upwardly toengage the under surface of said inner leg, and an upstanding rib spacedfrom said flange having an inner leg engaging the under surface of theouter leg of said arch.

8. In roofing of the character described, a pair of sheets, a rib on theedge of one sheet forming an arch having an inner and an outer Wallrespectively spaced from and adjacent the edge of said sheet, theadjacent edge of the other sheet extending under said arch and having anupbent edge forming a flange engaging the under surface of said innerWall, and a relatively low upstanding rib spaced from said flange toproduce a trough and engaging the under surface of the outer Wall ofsaid arch.

In testimony whereof I aflix my signature.

- RUDOLPH A. ECKBERG.

